123640888 has 16 divisors (see below), whose sum is σ = 264944880. Its totient is φ = 52988928.

The previous prime is 123640883. The next prime is 123640897. The reversal of 123640888 is 888046321.

It is a self number, because there is not a number n which added to its sum of digits gives 123640888.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123640883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1103881 + ... + 1103992.

It is an arithmetic number, because the mean of its divisors is an integer number (16559055).

Almost surely, 2^123640888 is an apocalyptic number.

It is an amenable number.

123640888 is an abundant number, since it is smaller than the sum of its proper divisors (141303992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123640888 is a wasteful number, since it uses less digits than its factorization.

123640888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207886 (or 2207882 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 123640888 is about 11119.3924294451. The cubic root of 123640888 is about 498.1812429338.

It can be divided in two parts, 1236 and 40888, that added together give a palindrome (42124).

The spelling of 123640888 in words is "one hundred twenty-three million, six hundred forty thousand, eight hundred eighty-eight".